document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1072856>Question 1072856</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The altitude (in feet) attained by a model rocket t sec into flight is given by the function h(t). Find the maximum altitude attained by the rocket. (Round your answer to the nearest foot.)\r<BR>\n" );
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document.write( "h(t)= -1/3t^3+2t^2+12t+20  (t&#8805;0)\r<BR>\n" );
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document.write( "= ?ft </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #687710 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52908)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=687710\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Take the derivative; equal it to zero and solve the quadratic equation to find the time of maximal altitude attained.\r<BR>\n" );
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document.write( "Then substitute this time into the function h(t) and find the maximal height.\r<BR>\n" );
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document.write( "You just are CALCULUS ! ! \r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;H&nbsp;a&nbsp;p&nbsp;p&nbsp;y&nbsp;&nbsp;&nbsp; c&nbsp;a&nbsp;l&nbsp;c&nbsp;u&nbsp;l&nbsp;a&nbsp;t&nbsp;i&nbsp;o&nbsp;n&nbsp;s &nbsp;!&nbsp;!\r<BR>\n" );
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document.write( " </SPAN>\n" );
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